How should we refer to an advance invoice (prepayment) that was paid before the e-invoicing was started?

General
1

As per the new rules we should populate the cac:DocumentReference with ID, UUID, IssueDate, IssueTime and DocumentTypeCode.
We have all details except the UUID for old advance invoices that have been paid.

What should we include in the tags under cac:DocumentReference in these cases?

Since the old advance invoices do not have any UUID assigned, the tags would look like this:

<cac:DocumentReference>
  <cbc:ID>9000013490</cbc:ID>
  <cbc:UUID/>
  <cbc:IssueDate>2014-01-14</cbc:IssueDate>
  <cbc:IssueTime>09:16:47</cbc:IssueTime>
  <cbc:DocumentTypeCode>386</cbc:DocumentTypeCode>
</cac:DocumentReference>

Or, shoudl we generate a UUID for those advance invoices that are not fully utilized, and submit the cac:DocumentReference tags as follows:

<cac:DocumentReference>
  <cbc:ID>9000013490</cbc:ID>
  <cbc:UUID>abc7617b-15bd-4868-be24-55670355fdfd</cbc:UUID>
  <cbc:IssueDate>2014-01-14</cbc:IssueDate>
  <cbc:IssueTime>09:16:47</cbc:IssueTime>
  <cbc:DocumentTypeCode>386</cbc:DocumentTypeCode>
</cac:DocumentReference>

Which way is correct and accepted?

2

We actually got an answer to this question in today’s Q&A session, the UUID tag should be omitted completely. The resulting cac:DocumentReference tag will then look like this:

<cac:DocumentReference>
  <cbc:ID>9000013490</cbc:ID>
  <cbc:IssueDate>2014-01-14</cbc:IssueDate>
  <cbc:IssueTime>09:16:47</cbc:IssueTime>
  <cbc:DocumentTypeCode>386</cbc:DocumentTypeCode>
</cac:DocumentReference>
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